Gas-controlling attachment for gas-operated guns



C. SUTT'ER.

' GAS CONTROLLING ATTACHMENT FOR GAS OPERATED GUNS.

APPLICATION FILED FEB.27, 1922.

1,431,059, v Patented 0015.3,1922.

. Patented Oct. 3, 1922.

nears, stares P Fig.5 1

CHARLES Summit, or susnsnns, FRA CE- GAS-CONTROLLING ATTACHMENT'FORGAS-OPERATED GUNS.

Original application filed March 25, 1921, Serial No. 455,701. @Dividedand this application filed February 27, 1922. Serial No. 539,517. a I

'Z 0 all whom it may concern: I Be it known that I, CHARLES SUTTER, a.citizen of'the Republic of France, residing. at Suresnes, Seine,France, have invented .certain new and useful Improvements in.Gas-Controlling Attachments for Gas-Op- I, erated Guns; and I do herebydeclare the following to be a full, clear, andgexact .description oftheinvention, such as will en- 10. able others skilled in the art to whichit appertains to make and use the same.

4 .My. present invention relates to improved means ,for regulating orcontrolling, the relative amount ofthe powder gases delivered .1 fromthe bore of the gun to the motor piston in a gas operated gun.

The violence of the recoil of the motor piston would, of course, dependnot only ,upon the work it is called uponto do, but primarily uponthevolume and pressure ofv the powder gases that escape from the barindercontaining the motor piston.- In order to have the gun work w1th regu- 25 larity, it is desirable to have the passages clear through which thepowder gases pass from the gun barrel to the cylinder, and substantiallyuniform in minimum cross section; I There is a tendency, incident to jthe operation of such guns, for these pas- .sages to become clogged updue to the solid jmatter carried along with the gases which adhere 'tothe walls of the passage or pasages and ultimately clog up the same.

40 become clogged or. choked for any reason,

and to prevent any clogging up of such of the, gas-ports as are out ofaction for the time being. while the gun is in operation.

A further object of. the invention is to ensure a perfect. gas-tightjoint for preventing any leakage of the. powder gases as they'tra'velbetween the gas-port formed in the gun barrel and the gas-port formedinthe nozzle head ofthe device.

.50 M resent invention is es eciall in- .l y P p y.

"tended as a division'of my application entitled Improvements inautomatic machine 7 guns,-filed March 25, 1921, Sera- N 0. 455,701.

My invention will be more fully understood after. reference to theaccompanying Myp resent invention relates not only to w ducts orpassages, say three 7, f and 7, the.

interfering with the proper fit of the @plug F drawings, in which likeparts areindicated by similar reference symbols throughout the I severalviews, andin which H Figure 1- shows a side elevation of part of thebarrel pcrtion of a'gas operated gun with the cylinder, for the motorpiston at tached, parts. being shown in section. 1

Figure 2 shows in side elevation, on a larger scale, the arrangement bymeans of which the amount of powder gases delivered ,to the motor pistonmay be .modified according to I requirements.

= Figure I 3 shows a vertical longitudinal section of the parts shown inFigure 2.

Figure eL-shows a. section along the line 4-4 of Figure 3, looking inthe direction of the arrows, parts being shown in elevation; and

Figure 5 shows. a section along the line 55 of Figure 3, lookingin thedirection of, 7 5.

the arrows, parts being shown in elevation. ,rel. of the gun'and enterthe operating cylserves also as the carrier ring of the piece.

Thisband is fitted over the barrel A and I has the gas-ports whichregisters with the gas-port a from, the horse, and also has thegas-delivery'porte formed in the nozzle head 6 In the ring-E is boredtransversely a cylindrical'slot 6 into which isfitted a plug F, providedwith an angular opening 7" into which may be introduced asuitableinstrument, such as a key, for rotating the plug when desired.

The plug F is formed with ainumber of 9 5 diameters of which differ. Thediameter of each. duct' may be chosen at will for the 'purpose of. dulymodifying the amount of the powder gases delivered to the motor piston.Those-portions of the periphery of the plug debouchinto the perforation6. may be re duced n diameter as shown at 7, f, Fig .5, so as .tominimize fr1ct1on,w1thouthowever f-The plug maybe held in its adjustedposition' by means ofla set screw G. ,3 v

Assuming that it be desired to allow a relatively limited amount of thepowder '110 I 'F from which theductsf, f and fido not time securingzv'continuous gas-tightcon necti'on'between ports'e and e on'the one ethe gunner selectssay the duct f and causes it to communicate withthetwo-said gas-ports. WVhen the plug'F is properly ad- .escape ofauportion of the powder gas, a cylinder fast to the gun, and a motorpiston adapted toreciprocate in said fc-y-linder,"'of a band secured onsaid barrel and provided justed for theselected duct f. the gunnerdrives the set screw G home, so as to causethe oppositeside. ofthe-periphery 0f theplug to make a gas-tight joint against the oppositewall of the perforation 6 and effec'tivel'y' prevent any gas reachingthe remaining ductssayf f while at the 'same hand and duct ffon theother. I

omaeasng theset' screw f l h F becomesfl'oo'se' and" may be [adjusted toi another pos'ition'and is then tightened up" agaimwhile furthermore itmay be readily? removed-altogether"for purposes of'exa min'ationandcleansing, if and when required. Finally, the device i's',"ormaybe,=equipped w'ith'suitable marks which, being made visible fromtheeXterior, will*enable the gunner "clesir ed; but obviously thenumber.of saidvill of, the"mannfacturer. I I j It-will be-obvio'usthat variousmodificaducts may be increased ,or'" decreasedat the tions might bemade'in the hereinide'scribed construction, and'in 'the combination and"arrangement of "parts which could be used Pointed out in theblaiins. v

."Having thus described my" invention what I claim and desire to secureby fLett-ers Pat- "e'nt'ofthe UnitedStates is with the barrel andcarrier ring delivering ducts in the wall'sthereof, both orifices ofwith the barrel and carrier. ring delivering substantially cylindricalpl'ugha'ving. a series.

each of which iducts debou ch from thepe- {rip'hery of said member. I A

2. In a. gas operated un'," the combination,

' 'a' portion of'the powder gases from the 'bore of" the gun to themotorpiston, of a revoluble of transversely "disposed separate ducts/in'the said plug, andimeans'for locking said one of said ducts, whileisolating the remainder of said ducts by means of a gas tight joint orjoints.

,In a gas operated gun, the combination with a barrelprovided with aport for the with a downwardly projecting portion having a gas porttherein registering withv said drical bore intersecting the gas ports pm'vided in said band, andia substantially cylindricalplug providedfwithfaseries of transversely disposed ducts in the walls thereof, each adaptedto form a'continu'ous passage with said last mentioned;ports, and

thusfto permit the 'flow of gas'ifrom said barrel :to said cylinder,through'one duct'i.

only while the other ducts are completely 1,

masked. e p p p 4; In agasoperated the combination with a barrelprovided with a port for theescape of a portion of the powder gas, acylinderfast to the gun, anda motor piston .7

adapted torecipro'cate in'said cylindnbf a .band secured'on said barreland provided "with a downwardly projecting; portion having a gas port:therein registerlng "withfsaid "gas port in the barrel and also a port"opening into said'cylinder, the saidf downwardly projecting portion vvofsaid band beyin'g -a1so"provided with a transverse cylindrical-boreintersecting the gas iports'prov vid'ed 'inisaidban'd, and asubstantially cy-, "r h'out rheparting from the spirit of my in-"vention and I do not mean to limit the invention 'to such detailsexcept asjparticularly lindrical plug: provided with a series oftransversely disposed. ducts 'in tlie walls thereof, {each adapted toformla continuous passage Wlhh 'S3,ld last mentioned .ports, and thustd-permit'th'e flow of 'gas 'from said barrel to said cylinder throughone duct ;on1 "'whi1e the other ducts are completely "masked, with meansfor locking said plug at 'thefdesiredposition and for releasing I samewhen desired.

5. In a gasoperated' gun,the combination 'with' .a barrel provided witha"portforthe escape of :a port-ion of the powder ga'sfa cylinder fast tothe gun, and a motor' piston "adapted to reciprocate in said icyli'nder,of e "a secured on said barrel "and provided with'a downwardlyprojecting portionhaving agasporttherein, registering with' s'aid "gas"po'r't' in the barrel and .alsoa gas'port opening into said cylinder,the said down- 'in'g also provided with a'transverse cylin- W ly Pr j ctn p i n. O a bandv 3 I the walls, thereof, both'orifices of each of 'I"whichducts 'debo'uch from the per'iphery'of thereof, each adapted toform a continuous passage with said last mentioned ports, and thus topermit the fioW of gas from said barrel to said cylinder, through oneduct only while the other ducts are completely masked, andmeans forvisually indicating the position of said passages relative to saidports.

6. In a gas operated gun the combination with a barrel provided with aport for the escape of a portion of the powder gas, a cylinder fast tothe gun, and a motor piston adapted to reciprocate in said cylinder, ofa band secured on said barrel and provided with adownwardly projectingportion having a gas port therein registering with said gas port in thebarrel and also a gas port opening into said cylinder, the saiddownwardly projecting portion of said band being also provided with atransverse cylin drical bore intersecting the gas ports prowhen desired,and means for visually indieating the positionof said passages relativeto said ports.

CHARLES SUTTER. v

